Preliminary Gemini 4 Crew Debriefing, Part II, 1965

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McDivitt
know what we're going to do about wrist watches.
Maybe they'll design us a ten-hour wrist watch
that we can wear.
I don't see any reason why
they can't .
They can design twelve-hour ones just
as easily.
We're going to go to this in Apollo.
We should face up to it and go ahead and spend the
money to get ourselves a proper t iming piece of
equipment and get our ranges and stuff operating
on elapsed time. In long flights this is the kind
of thing that ' s going to be of interest . It was
confusing to me, to tell you the truth , to operate
on Greenwich Mean Time and elapsed time through-­
out the flight. I was constantly adding and sub­
tracting.
They'd call us up Greenwich Mean Times
and I'd want to convert them to what I was using
on my flight plan. I found this a gr eat incon­
venience.
I concur with what Ed said.
I ran the whole
flight plan using elapsed time except for the
times where they called a specific GMT time to
perform a function .
I did it off of a twelve-hour
face wrist watch.
I added up all my twelve-hour
incements and came to whatever I wanted. If I